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sctp: Clean up sctp checksumming code

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The sctp crc32c checksum is always generated in little endian.
So, we clean up the code to treat it as little endian and remove
all the __force casts.

Suggested by Herbert Xu.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vlad Yasevich 2009-02-13 08:33:42 +00:00 • committed by David S. Miller
parent 06e868066e
commit 4458f04c02
4 changed files with 20 additions and 21 deletions
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11
net/sctp/input.c
View file

@ -83,14 +83,15 @@ static inline int sctp_rcv_checksum(struct sk_buff *skb)
{
struct sk_buff *list = skb_shinfo(skb)->frag_list;
struct sctphdr *sh = sctp_hdr(skb);
__be32 cmp = sh->checksum;
__be32 val = sctp_start_cksum((__u8 *)sh, skb_headlen(skb));
__le32 cmp = sh->checksum;
__le32 val;
__u32 tmp = sctp_start_cksum((__u8 *)sh, skb_headlen(skb));
for (; list; list = list->next)
val = sctp_update_cksum((__u8 *)list->data, skb_headlen(list),
val);
tmp = sctp_update_cksum((__u8 *)list->data, skb_headlen(list),
tmp);
val = sctp_end_cksum(val);
val = sctp_end_cksum(tmp);
if (val != cmp) {
/* CRC failure, dump it. */